Mechanical stokeb



VPatented apr. 27, T1926.

llNllllD STATES Louis saturnin, or caricano, immers.

MECHANICAL STOKER.

Application sied December so, ieee. semi No. 431,935.

To all whom t may concern:

Be it known that I, LOUIS GRUNBIN, a citizen of the United States, residing at Chicago, in the county of VCook and State of Illinois, have invented certain new and use ful lmprovements in Mechanical Stokers, of lwhich the following is a description.

My invention belongs to that general class of mechanisms known as mechanical stokers. and particularly relates to those stokers of the chain grate type.

In stokers of this type, ash and grit collect in the chain links between the pins and pin bearings, and tend to rapidly wear away the pivotally interconnected members at these parts. rlhe grates travel very slowly, not more than a few inches per minute, and as the fuel is usually wet when fed inte the stocker, the water and fuel particles drip through the fuel bed and collect in the pin bearings of the links. As these links pass through the hot furnace, the ash and foreign' matter in the bearings become solidified or caked and cause the pins to bind in the links.

My invention provides for the prevention of the accumulation of ash and other foreign matter between the pins and links bearings, and provides an outlet for the ready discharge of any matter that might Work into the link bearing apertures. Many other ob jects and advantages of the construction herein shown and described will be obvious to those skilled in the art, from the disclosures herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference. characters indicate like or corresponding parts,

Fig. l is a side elevation of one of my chain grate links.

Fig. 2 is a verticalsection taken on line 2 2 of Fig.' 1.

Fig. 3 is a section taken on line 3--3 of Fig. l.

Fig. a is a side elevation of a modified y form of chain grate link, and

Fig, 5 is a section taken one line 5-5 of Fig. 4.

In chain grate structures there are a number of links extending across the width of the combustion chamber and these links move through the combustion chamber and discharge the ash at the rear of the chamber. l indicates one of the grate bar links, the same provided with a top face or fuel. supporting portion 3 and a support-ing web of a lesser thickness than said top and extending transversely thereto. Recesses 5 may he provided along the sides of said top and extend downwardly thereof so that the forced draft or other air supply may pass upwardly through the recesses and through the fuel hed supported bythe grate.

Bearing apertures S extend transversely through the web adjacent its lower end, these openings being` preferablyv elongated or oblong with the long axes of the openings extending` substantially parallel with the long` a of the link. The openings are surrounded by the material .of the web. Flanges or bosses 6 are arranged on the web each surrounding its respective opening and extending laterally of the web. Reinforcing ribs 7 may be used to connect the flanges to the fuel supporting face of the link. A series of these links are arranged across the combustion chamber to form the grate and pins 2 are positioned through the openings 8.

The movement of the grate is effected by sprocket wheels or the like (not shown) that engage with the pins 2. rlhe pins 2 are adapted to engage against the outer ends of the openings resulting informing substantially large clearance spaces 9 between the inner or non-bearing side of the pin and the inner end of the opening wall. This large space between the pin and the inner side of the aperture wall tends to prevent the accumulation of all foreign matter. such as ash, therein, and in case any of such foreign matter should enter into this clearance space it would be discharged therefrom as the links pass from the roller or sprocket member.

ln order to more readily provide for the discharge of ash between the pin and the opening, I have shown in Figs. l and 5 a modified forni of flange in which the flanges 6 only partially surround their respective openings and the ends of each flange are spaced apart to forni a discharge opening l0 leading obliquely downwardly from the end of the bearing aperture of the link. rllhus the ash entering the bearing apertures will be immediately discharged through the outlets l0.`

By luy improvement, thelv andA links will not accumulate ash and other material therebetween, and conse uentlythepdurabil.- ity of these parts Will he greatly vinw@r-'smcl.

Hereto'ore, Where no provisionWas-pinacle;

'tion,' arrangementand'- combination of p arts herein shoxvnf and deseriloedlor uses inenftioned.1v 5 What I elanras new andfdesjre' to seein-e by Letters Patent is:4 y v l. A 1i" k `fora'e'lfm'in grate;comprising a fuel supp'orting`l portio'npl and a' supporting Well; said Web beingrln'ed With oblong' openings surro'undedby the material th'e'reoff and 'extending traverselyftherethrough, with their long' axes substantially parallel With ie" untlerstooldf as f tiveJ openg's,` theends of each flange beingV spaeed-apart to orm a rdischarge passage leading obliquely downward 'fro-1n the end Y of the` opening.;

2. A link for a ehanrgrate, Comprising a fuel supporting` p'ortonand a sup-porting web; said web being formed `vvith oblong opeiii'ngssuriounded by the material thereof andi" entendi-ng. transversely therethrough, withl their'longv axes: substantially parallel With-ther lo'ng axis ot the .lin-k; the. web being further provided With laterally eX- tending' flanges which partially surround. therespectivey op'euli-ugs, the ends o'teach flange being; s'pae'edapartto form a discharge passage leadingobliquely downward supportinfgfiaee otthe link.-

In testimony whereof' I' have hereunto signed my name. y l

LOUTS GRUNDIN.y 

